55213442309 has 8 divisors (see below), whose sum is σ = 55440519552. Its totient is φ = 54986495440.

The previous prime is 55213442279. The next prime is 55213442311. The reversal of 55213442309 is 90324431255.

It is a happy number.

55213442309 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-55213442309 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55213472309) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 866864 + ... + 928374.

It is an arithmetic number, because the mean of its divisors is an integer number (6930064944).

Almost surely, 2^55213442309 is an apocalyptic number.

It is an amenable number.

55213442309 is a deficient number, since it is larger than the sum of its proper divisors (227077243).

55213442309 is a wasteful number, since it uses less digits than its factorization.

55213442309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 65187.

The product of its (nonzero) digits is 129600, while the sum is 38.

The spelling of 55213442309 in words is "fifty-five billion, two hundred thirteen million, four hundred forty-two thousand, three hundred nine".